/usr/ is in ruby-webrobots 0.1.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/webrobots/
/usr/lib/ruby/vendor_ruby/webrobots/nokogiri.rb
/usr/lib/ruby/vendor_ruby/webrobots/robotstxt.rb
/usr/lib/ruby/vendor_ruby/webrobots/robotstxt.ry
/usr/lib/ruby/vendor_ruby/webrobots/version.rb
/usr/lib/ruby/vendor_ruby/webrobots.rb
/usr/share/
/usr/share/doc/
/usr/share/doc/ruby-webrobots/
/usr/share/doc/ruby-webrobots/README.rdoc
/usr/share/doc/ruby-webrobots/changelog.Debian.gz
/usr/share/doc/ruby-webrobots/copyright
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/webrobots-0.1.2.gemspec